EP0464290A1 - Mobile lifting platform forming a support for a camera - Google Patents

Mobile lifting platform forming a support for a camera Download PDF

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Publication number
EP0464290A1
EP0464290A1 EP90401916A EP90401916A EP0464290A1 EP 0464290 A1 EP0464290 A1 EP 0464290A1 EP 90401916 A EP90401916 A EP 90401916A EP 90401916 A EP90401916 A EP 90401916A EP 0464290 A1 EP0464290 A1 EP 0464290A1
Authority
EP
European Patent Office
Prior art keywords
pentograph
lifting platform
control unit
hydraulic control
platform according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90401916A
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German (de)
French (fr)
Inventor
Roland Sauzet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
Original Assignee
MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE) filed Critical MOVIETECH (SOCIETE A RESPONSABILITE LIMITEE)
Publication of EP0464290A1 publication Critical patent/EP0464290A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0691—Asymmetric linkages, i.e. Y-configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/048—Mobile camera platform
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/0625—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement with wheels for moving around the floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated

Definitions

  • the present invention relates to a mobile lifting platform, commonly called “dolly", which serves as a support for a film or video camera and which is used worldwide for all audio-visual productions.
  • This platform moves in rotation (for the realization of tracking shots) while having the possibility of raising or lowering the camera that it carries as high and as low as possible.
  • Pushed by a machinist the platform moves on regular floors using rubber tires, but it can also roll on rails with twin wheels or by adding a bogie accessory.
  • elevating platforms called telescopic column, that is to say comprising a vertical telescopic column whose upper element has a support for the camera and a seat for the operator, the extension and the column retraction being controlled hydraulically or electrically.
  • This type of lifting platform has major drawbacks, so that the speed of rise of the column is not fast enough and does not allow for example to reach the speed of movement of a man who gets up from 'a chair constituting the reference speed in the matter.
  • Another major disadvantage is that, when the column is at the bottom of its travel, the axis of the camera it carries is sometimes placed too high which prohibits filming from certain angles scenes taking place at ground level. .
  • So-called pentograph lifting platforms are also known, in which the elevation movement is provided by articulated arms in the form of a pentograph. These platforms benefit from a good notoriety because of the speeds of ascent and descent that they allow, as well as because of the very low position of the optical axis of the camera that they allow.
  • the pentograph elevating platforms have the disadvantage of a great lack of operator comfort in the case of horizontal and vertical panoramic movements, since the latter cannot follow the camera in the upward movements. and lowering it, and also cannot rotate with it.
  • the object of the present invention is to remedy the drawbacks presented by the known lifting platforms mentioned above and, to this end, to provide a mobile lifting platform which, while ensuring rapid vertical movement of the camera, by allowing the operator to follow the camera as well in the movements of raising and lowering of it as during its rotation, and by authorizing a descent in the camera in a very low position, is of a particularly simple use and rational.
  • the lifting platform and constituted by the association of four main parts, comprising a support plate for the camera and the operators, a device for lifting the plate taking the form of a pentograph, a hydraulic assembly comprising the means for controlling the movement of extension and retraction of the pentograph, and a mobile chassis intended to support the other three parts and to ensure the movement of the lifting platform.
  • the different parts mentioned above of the platform according to the invention are connected to each other by quick assembly elements that do not require a tool, so that the assembly or separation of said parts can be perform very simply and very quickly.
  • One can for example disassemble, from the movable chassis, the assembly constituted by the pentograph, the hydraulic control assembly and the plate to thus dispose this assembly on a vehicle if the shooting conditions require it.
  • the pentograph has no movable support at its lower front part, the latter being replaced by a telescopic column connected to a posterior intermediate articulation of the pentograph.
  • This arrangement advantageously makes it possible to release, from the support structure necessary in a traditional pentograph system, the zone situated under the front of the plate and, as the front wheels of the mobile chassis generally occupy a remote position, the door false thus created makes it possible to adopt an advantageous overhanging position in certain use cases, for example to get as close as possible to certain platforms.
  • the lower arm of the pentograph is articulated to the lower front part of the hydraulic control assembly, and the upper ends of the pentograph are provided with one of the rollers moving in slides from the front of the plate and the other with yokes. hinged at the back of it.
  • the force required to extend and retract the pentograph is provided on each side by a hydraulic cylinder acting on the lower arm of the pentograph via two links. One is articulated at one of its ends on the hydraulic assembly, while the other is connected to the lower arm. The second end of each link pivots on a common axis, on which the movable yoke of the jack is supported. This arrangement has the effect of creating a variable ratio reduction.
  • the plate advantageously made of light alloy, is coated on its upper face with an anti-slip material.
  • an anti-slip material In its center it has a rotating element designed to receive, for a 360 ° rotation, a support intended to receive the camera and one or two operators.
  • the hydraulic control assembly includes all the elements necessary for the supply of power and its use. It consists of a chassis incorporating a hydraulic fluid reservoir, and it supports the rotation shaft of the pentograph, the guide column, and the upper anchoring of the cylinders. A motor pump attached directly to the tank supplies hydraulic accumulators which store the energy necessary for the cylinders. Electrical and electronic means control the operation of the lifting platform, these means possibly comprising a programmable set point generator making it possible to compose all forms of up and down movements, and a memory for instantaneous recording of movements. Manual control means can also be provided.
  • a mobile chassis made of light alloy, which rests on the ground by a train of front steered wheels 2 and by a train of rear steered wheels 3.
  • a double steering system 4 allows either a opposite steering of the front and rear axles for on-site pivoting, i.e. a parallel orientation of the four wheels, on 360 ⁇ , for diagonal and transverse movements.
  • the steering box is designed to be removable so that it can be easily replaced by other controls offering different steering characteristics.
  • the front track of the chassis can be increased by 40 cm to ensure, when necessary, greater stability to the assembly.
  • Each wheel 2, 3 is provided with a disc brake, the disc being fixed to the core of the wheel while the piston, providing the braking force, is integral with the wheel stub.
  • a hydraulic control assembly 5 On the chassis 1 is fixed, at its rear part, a hydraulic control assembly 5.
  • This connection, as well as those existing between the hydraulic control assembly 5 and the pentograph 6, as well as between the pentograph 6 and the plate 7 are produced by means of quick-release pins requiring no tools, as shown in FIG. 5.
  • the hydraulic control assembly 5 is constituted by a light alloy chassis, having at its lower front end bearings 8 receiving a transverse shaft 9. On each end of the shaft 9 is articulated, near its bent rear end, the lower arm 10 of a pentograph 6. The latter has no movable support in the lower front part, this being replaced by a telescopic column 11 carried by the hydraulic control assembly 5 and connected to its lower part by the 'rear intermediate articulation 12 of the lower half-arm 13.
  • the upper end of an upper arm 14 has rollers 15 moving in a lateral slide of the support plate 7, while the upper end of the other upper arm 16 of the pentograph is provided with a yoke 17 articulated at the rear of the plate 7.
  • the plate 7 made of lightly ribbed light alloy at the bottom, is coated with a non-slip material. It has at its front part two slides in which the rollers 15 move and, at its rear part, bearings cooperating by means of removable pins with the yokes 17. At the center of the plate 7 is fixed a rotary element 18, allowing 360 ° pivoting, on which is intended to fix a support (not shown) receiving the camera equipment and operators.
  • the bent rear end of the lower arm 10 is connected, by an articulated link 19, to a yoke 20 carried by the rod 21 of a hydraulic cylinder 22 whose end, on the cylinder side, is articulated at 23 to the upper part of the hydraulic control assembly 5.
  • Another link 24 is articulated at one end on the yoke 21 and, at its opposite end, at a fixed point 25 of the hydraulic control assembly 5.
  • the mobile lifting platform thus produced can move vertically at a speed of the order of 50 cm / s, and the reference surface of its platform 7 varies between 0.26 m (low position) and 1.65 m ( high position) in relation to the ground.
  • FIG. 5 there is shown by way of example, applied to the connection of the pentograph arm 10 with the control rod 19, a quick assembly device according to the invention.
  • the axis 29 of articulated connection between the arm 10 and the link 19 is immobilized by means of a pin 30 internally comprising a plunger 31 which passes through the link 19 and engages in an opening of the axis 29.
  • the plunger 31 controls, at rest, the radial outlet of the balls 32 preventing the pin from being removed.
  • a simple push on an external extension 33 of the plunger 31 ensures the erasure of the balls 32 by allowing easy removal of the spindle, therefore the extraction of the pin 29 and the rapid disassembly of the elements 10 and 19.
  • the plate 7 being in its low position shown in FIGS. 1 and 4, the control of the supply of the jacks 22 causes the rods 21 to come out of these jacks and the rotation of the rods 24 counterclockwise around the joints 23. Due to this rotation, a traction is applied to the bent end of the lower arms 10 which causes a clockwise rotation of the arms 10 around the shaft 9 ensuring the extension of the pentographs 6 and the elevation of the plate 7 guided vertically by the telescopic column 11.
  • FIG. 2 it is understood that the absence of lower movable support for the pentographs 6 makes it possible to approach very close to obstacles of low height, such as platforms for example, the platform 7 then overhanging these obstacles in a way that may be advantageous in certain cases of use.
  • the mobile assembly 1, the assembly constituted by the hydraulic control assembly 5, the pentograph 6 and the plate 7, can be separated very simply and without tools. thus disassembled can then be used for example on a vehicle, in the case where this kind of shooting is to be carried out.
  • the frame 1 can for its part be used with a conventional fixed plate.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)

Abstract

The lifting platform comprises a number of independent elements which are assembled with one another by means of rapid-demounting members. These elements comprise a mobile chassis 1, a hydraulic control unit 5, a pantograph 6 and a deck 7. The pantograph 6 does not comprise a lower mobile support towards the front, which is replaced by a mobile vertical column 11 connected to an intermediate rear articulation 12 of the pantograph 6. The invention can be used as a support for a camera and operators, during film-making. <IMAGE>

Description

La présente invention concerne une plate-forme élévatrice mobile, couramment appelée "dolly", qui sert de support pour une caméra film ou vidéo et qui est utilisée dans le monde entier pour toutes les productions audio-visuelles.The present invention relates to a mobile lifting platform, commonly called "dolly", which serves as a support for a film or video camera and which is used worldwide for all audio-visual productions.

Cette plate-forme se déplace par roulement (pour la réalisation de travellings) tout en ayant la possibilité de faire monter ou descendre la caméra qu'elle porte le plus haut et le plus bas possible. Poussée par un machiniste la plate-forme se déplace sur des sols réguliers au moyen de pneumatiques caoutchouc, mais elle peut aussi rouler sur des rails avec des roues jumelées ou en ajoutant un accessoire formant boggie.This platform moves in rotation (for the realization of tracking shots) while having the possibility of raising or lowering the camera that it carries as high and as low as possible. Pushed by a machinist, the platform moves on regular floors using rubber tires, but it can also roll on rails with twin wheels or by adding a bogie accessory.

On connaît des plates-formes élévatrices dites à colonne télescopique, c 'est-à-dire comprenant une colonne télescopique verticale dont l'élément supérieur présente un support pour la caméra ainsi qu'un siège pour l'opérateur, l'extension et la rétraction de la colonne étant commandées hydrauli- quement ou électriquement. Ce type de plate-forme élévatrice présente des inconvénients majeurs, ainsi par ce que la vitesse de montée de la colonne n'est pas assez rapide et ne permet pas par exemple d'atteindre la vitesse du mouvement d'un homme qui se lève d'une chaise constituant la vitesse de référence en la matière. Un autre inconvénient majeur est que, quand la colonne est au plus bas de sa course, l'axe de la caméra qu'elle porte se trouve parfois disposé trop haut ce qui interdit de filmer sous certains angles des scènes se déroulant au ras du sol.There are known elevating platforms called telescopic column, that is to say comprising a vertical telescopic column whose upper element has a support for the camera and a seat for the operator, the extension and the column retraction being controlled hydraulically or electrically. This type of lifting platform has major drawbacks, so that the speed of rise of the column is not fast enough and does not allow for example to reach the speed of movement of a man who gets up from 'a chair constituting the reference speed in the matter. Another major disadvantage is that, when the column is at the bottom of its travel, the axis of the camera it carries is sometimes placed too high which prohibits filming from certain angles scenes taking place at ground level. .

On connaît aussi des plates-formes élévatrices dites à pentographe, dans lesquelles le mouvement d'élévation est assuré par des bras articulés en forme de pentographe. Ces plates-formes bénéficient d'une bonne notoriété en raison des vitesses de montée et de descente qu'elles permettent, ainsi qu'en raison de la position très basse de l'axe optique de la caméra qu'elles autorisent. Par contre, les plates-formes élévatrices à pentographe présentent l'inconvénient d'un grand manque de confort de l'opérateur dans le cas de mouvements panoramiques horizontaux et verticaux, car celui-ci ne peut pas suivre la caméra dans les mouvements de montée et de descente de celle-ci, et ne peut pas non plus pivoter avec elle.So-called pentograph lifting platforms are also known, in which the elevation movement is provided by articulated arms in the form of a pentograph. These platforms benefit from a good notoriety because of the speeds of ascent and descent that they allow, as well as because of the very low position of the optical axis of the camera that they allow. On the other hand, the pentograph elevating platforms have the disadvantage of a great lack of operator comfort in the case of horizontal and vertical panoramic movements, since the latter cannot follow the camera in the upward movements. and lowering it, and also cannot rotate with it.

La présente invention a pour objet de remédier aux inconvénients présentés par les plates-formes élévatrices connues mentionnées ci-dessus et, à cet effet, de fournir une plate-forme élévatrice mobile qui, tout en assurant un déplacement vertical rapide de la caméra, en permettant à l'opérateur de suivre la caméra aussi bien dans les mouvements de montée et de descente de celle-ci que lors de sa rotation, et en autorisant une descente dans la caméra dans une position très basse, est d'une utilisation particulièrement simple et rationnelle.The object of the present invention is to remedy the drawbacks presented by the known lifting platforms mentioned above and, to this end, to provide a mobile lifting platform which, while ensuring rapid vertical movement of the camera, by allowing the operator to follow the camera as well in the movements of raising and lowering of it as during its rotation, and by authorizing a descent in the camera in a very low position, is of a particularly simple use and rational.

Selon l'invention la plate-forme élévatrice et constituée par l'association de quatre parties principales, comprenant un plateau de support de la caméra et des opérateurs, un dispositif d'élévation du plateau prenant la forme d'un pentographe, un ensemble hydraulique comprenant les moyens de commande du mouvement d'extension et de rétraction du pentographe, et un châssis mobile destiné à supporter les trois autres parties et à assurer le déplacement de la plate-forme élévatrice. Les différentes parties mentionnées ci-dessus de la plate-forme selon l'invention sont reliées les unes aux autres par des éléments d'assemblage rapide ne nécessitant pas d'outil, de sorte que l'assemblage ou la séparation desdites parties peut s'effectuer très simplement et très rapidement. On peut par exemple désassembler, du châssis mobile, l'ensemble constitué par le pentographe, l'ensemble hydraulique de commande et le plateau pour disposer ainsi cet ensemble sur un véhicule si les conditions de tournage l'exigent.According to the invention the lifting platform and constituted by the association of four main parts, comprising a support plate for the camera and the operators, a device for lifting the plate taking the form of a pentograph, a hydraulic assembly comprising the means for controlling the movement of extension and retraction of the pentograph, and a mobile chassis intended to support the other three parts and to ensure the movement of the lifting platform. The different parts mentioned above of the platform according to the invention are connected to each other by quick assembly elements that do not require a tool, so that the assembly or separation of said parts can be perform very simply and very quickly. One can for example disassemble, from the movable chassis, the assembly constituted by the pentograph, the hydraulic control assembly and the plate to thus dispose this assembly on a vehicle if the shooting conditions require it.

Selon une caractéristique importante de l'invention, le pentographe est démuni d'appui mobile à sa partie inférieure avant, celui-ci étant remplacé par une colonne télescopique reliée à une articulation intermédiaire postérieure du pentographe. Cette disposition permet avantageusement de dégager, de la structure d'appui nécessaire dans un système à pentographe traditionnel, la zone située sous l'avant du plateau et, comme les roues avant du châssis mobile occupent généralement une position reculée, le porte-à-faux ainsi créé permet d'adopter une position en surplomb avantageuse dans certains cas d'utilisation, par exemple pour s'approcher au maximum de certains quais. Le bras inférieur du pentographe est articulé à la partie antérieure basse de l'ensemble de commande hydraulique, et les extrémités supérieures du pentographe sont munies l'une de galets se déplaçant dans des glissières de l'avant du plateau et l'autre de chapes s'articulant à l'arrière de celui-ci.According to an important characteristic of the invention, the pentograph has no movable support at its lower front part, the latter being replaced by a telescopic column connected to a posterior intermediate articulation of the pentograph. This arrangement advantageously makes it possible to release, from the support structure necessary in a traditional pentograph system, the zone situated under the front of the plate and, as the front wheels of the mobile chassis generally occupy a remote position, the door false thus created makes it possible to adopt an advantageous overhanging position in certain use cases, for example to get as close as possible to certain platforms. The lower arm of the pentograph is articulated to the lower front part of the hydraulic control assembly, and the upper ends of the pentograph are provided with one of the rollers moving in slides from the front of the plate and the other with yokes. hinged at the back of it.

La force nécessaire au mouvement d'extension et de rétraction du pentographe est assurée, de chaque côté, par un vérin hydraulique agissant sur le bras inférieur du pentographe par l'intermédiaire de deux biellettes. L'une est articulée à l'une de ses extrémités sur l'ensemble hydraulique, alors que l'autre est reliée au bras inférieur. La seconde extrémité de chaque biellette pivote sur un axe commun, sur lequel prend appui la chape mobile du vérin. Cette disposition a pour effet de créer une démultiplication à rapport variable.The force required to extend and retract the pentograph is provided on each side by a hydraulic cylinder acting on the lower arm of the pentograph via two links. One is articulated at one of its ends on the hydraulic assembly, while the other is connected to the lower arm. The second end of each link pivots on a common axis, on which the movable yoke of the jack is supported. This arrangement has the effect of creating a variable ratio reduction.

Le plateau, réalisé avantageusement en alliage léger, est revêtu sur sa face supérieure d'un matériau anti-dérapant. En son centre il comporte un élément rotatif conçu pour accueillir, en vue d'une rotation sur 360` , un support destiné à recevoir la caméra et un ou deux opérateurs.The plate, advantageously made of light alloy, is coated on its upper face with an anti-slip material. In its center it has a rotating element designed to receive, for a 360 ° rotation, a support intended to receive the camera and one or two operators.

L'ensemble hydraulique de commande regroupe tous les éléments nécessaires à la fourniture de la puissance et à son utilisation. Il est constitué d'un châssis incorporant un réservoir de liquide hydraulique, et il supporte l'arbre de rotation du pentographe, la colonne de guidage, et l'ancrage supérieur des vérins. Une motopompe fixée directement sur le réservoir alimente des accumulateurs hydrauliques qui emmagasinent l'énergie nécessaire aux vérins. Des moyens électriques et électroniques commandent le fonctionnement de la plate-forme élévatrice, ces moyens pouvant comprendre un générateur de consignes programmable permettant de composer toutes formes de mouvements de montée et de descente, et une mémoire pour l'enregistrement instantané des mouvements. Des moyens de commande manuelle peuvent aussi être prévus.The hydraulic control assembly includes all the elements necessary for the supply of power and its use. It consists of a chassis incorporating a hydraulic fluid reservoir, and it supports the rotation shaft of the pentograph, the guide column, and the upper anchoring of the cylinders. A motor pump attached directly to the tank supplies hydraulic accumulators which store the energy necessary for the cylinders. Electrical and electronic means control the operation of the lifting platform, these means possibly comprising a programmable set point generator making it possible to compose all forms of up and down movements, and a memory for instantaneous recording of movements. Manual control means can also be provided.

Pour bien faire comprendre le dispositif selon la présente invention on en décrira ci-après, à titre d'exemple sans caractère limitatif, une forme d'exécution préférée en référence au dessin schématique annexé dans lequel :

  • la figure 1 est une vue en élévation d'une plate-forme élévatrice mobile avec son plateau de support en position extrême basse ;
  • la figure 2 est une vue correspondant à la figure 1 avec le plateau de support en position extrême haute ;
  • la figure 3 est, à plus grande échelle, une vue en élévation, partiellement en coupe, montrant plus particulièrement le dispositif de commande du mouvement du pentographe ;
  • la figure 4 est une vue à plus grande échelle en élévation du plateau ; et
  • la figure 5 montre le système d'assemblage rapide utilisé pour relier entre eux les éléments de la plate-forme élévatrice selon l'invention.
To clearly understand the device according to the present invention, a preferred embodiment will be described below, by way of example, with reference to the appended schematic drawing in which:
  • Figure 1 is an elevational view of a mobile lifting platform with its support plate in the extreme low position;
  • Figure 2 is a view corresponding to Figure 1 with the support plate in the extreme high position;
  • Figure 3 is, on a larger scale, an elevational view, partially in section, showing more particularly the device for controlling the movement of the pentograph;
  • Figure 4 is an enlarged view in elevation of the plate; and
  • Figure 5 shows the quick assembly system used to connect together the elements of the lifting platform according to the invention.

En référence au dessin on a représenté en 1 un châssis mobile, réalisé en alliage léger, qui repose sur le sol par un train de roues avant directrices 2 et par un train de roues arrière directrices 3. Un double système de direction 4 autorise soit un braquage en opposition des trains avant et arrière pour un pivotement sur place, soit une orientation en parallèle des quatre roues, sur 360` , pour des déplacements diagonaux et transversaux. Le boîtier de direction est prévu démontable pour pouvoir être aisément remplacé par d'autres commandes offrant des caractéristiques de braquage différentes.Referring to the drawing, there is shown at 1 a mobile chassis, made of light alloy, which rests on the ground by a train of front steered wheels 2 and by a train of rear steered wheels 3. A double steering system 4 allows either a opposite steering of the front and rear axles for on-site pivoting, i.e. a parallel orientation of the four wheels, on 360`, for diagonal and transverse movements. The steering box is designed to be removable so that it can be easily replaced by other controls offering different steering characteristics.

La voie avant du châssis peut être augmentée de 40 cm pour assurer, quand cela est nécessaire, une plus grande stabilité à l'ensemble. Chaque roue 2, 3 est pourvue d'un frein à disque, le disque étant fixé au noyau de la roue alors que le piston, fournissant l'effort de freinage, est solidaire de la fusée de roue.The front track of the chassis can be increased by 40 cm to ensure, when necessary, greater stability to the assembly. Each wheel 2, 3 is provided with a disc brake, the disc being fixed to the core of the wheel while the piston, providing the braking force, is integral with the wheel stub.

Sur le châssis 1 est fixé, à sa partie arrière, un ensemble de commande hydraulique 5. Cette liaison, de même que celles existant entre l'ensemble de commande hydraulique 5 et le pentographe 6, ainsi qu'entre le pentographe 6 et le plateau 7 sont réalisées au moyen d'axes à démontage rapide ne nécessitant aucun outil, comme on l'a représenté à la figure 5.On the chassis 1 is fixed, at its rear part, a hydraulic control assembly 5. This connection, as well as those existing between the hydraulic control assembly 5 and the pentograph 6, as well as between the pentograph 6 and the plate 7 are produced by means of quick-release pins requiring no tools, as shown in FIG. 5.

L'ensemble de commande hydraulique 5 est constitué par un châssis en alliage léger, présentant à son extrémité inférieure avant des paliers 8 recevant un arbre transversal 9. Sur chaque extrémité de l'arbre 9 est articulé, près de son extrémité arrière coudée, le bras inférieur 10 d'un pentographe 6. Ce dernier ne présente pas d'appui mobile en partie inférieure avant, celui-ci étant remplacé par une colonne télescopique 11 portée par l'ensemble de commande hydraulique 5 et reliée à sa partie inférieure à l'articulation intermédiaire arrière 12 du demi bras inférieur 13. L'extrémité supérieure d'un bras supérieur 14 présente des galets 15 se déplaçant dans une glissière latérale du plateau de support 7, alors que l'extrémité supérieure de l'autre bras supérieur 16 du pentographe est muni d'une chape 17 s'articulant à l'arrière du plateau 7.The hydraulic control assembly 5 is constituted by a light alloy chassis, having at its lower front end bearings 8 receiving a transverse shaft 9. On each end of the shaft 9 is articulated, near its bent rear end, the lower arm 10 of a pentograph 6. The latter has no movable support in the lower front part, this being replaced by a telescopic column 11 carried by the hydraulic control assembly 5 and connected to its lower part by the 'rear intermediate articulation 12 of the lower half-arm 13. The upper end of an upper arm 14 has rollers 15 moving in a lateral slide of the support plate 7, while the upper end of the other upper arm 16 of the pentograph is provided with a yoke 17 articulated at the rear of the plate 7.

Le plateau 7, réalisé en alliage léger fortement nervuré en partie inférieure, est revêtu d'un matériau antidérapant. Il présente à sa partie avant deux glissières dans lesquelles se déplacent les galets 15 et, à sa partie arrière, des paliers coopérant par l'intermédiaire d'axes démontables avec les chapes 17. Au centre du plateau 7 est fixé un élément rotatif 18, permettant un pivotement sur 360°, sur lequel est destiné à se fixer un support (non représenté) recevant le matériel de prise de vues et les opérateurs.The plate 7, made of lightly ribbed light alloy at the bottom, is coated with a non-slip material. It has at its front part two slides in which the rollers 15 move and, at its rear part, bearings cooperating by means of removable pins with the yokes 17. At the center of the plate 7 is fixed a rotary element 18, allowing 360 ° pivoting, on which is intended to fix a support (not shown) receiving the camera equipment and operators.

De chaque côté, l'extrémité arrière coudée du bras inférieur 10 est reliée, par une biellette articulée 19, à une chape 20 portée par la tige 21 d'un vérin hydraulique 22 dont l'extrémité, côté cylindre, est articulée en 23 à la partie supérieure de l'ensemble de commande hydraulique 5. Une autre biellette 24 est articulée à une extrémité sur la chape 21 et, à son extrémité opposée, en un point fixe 25 de l'ensemble de commande hydraulique 5. Cette disposition comprenant les biellettes 19 et 24 permet de créer une démultiplication à rapport variable.On each side, the bent rear end of the lower arm 10 is connected, by an articulated link 19, to a yoke 20 carried by the rod 21 of a hydraulic cylinder 22 whose end, on the cylinder side, is articulated at 23 to the upper part of the hydraulic control assembly 5. Another link 24 is articulated at one end on the yoke 21 and, at its opposite end, at a fixed point 25 of the hydraulic control assembly 5. This arrangement comprising the rods 19 and 24 makes it possible to create a gear ratio with variable ratio.

L'ensemble de commande hydraulique 5, qui supporte l'arbre de rotation 9 du pentographe 6 et la colonne télescopique 11 et qui réalise l'ancrage supérieur des vérins 22, reçoit un réservoir de fluide hydraulique alimentant par une motopompe des accumulateurs de fluide hydraulique 26. Pour la commande des vérins 22, l'ensemble 5 comprend un électro-distributeur proportionnel à télécommande 28 dont les fonctions sont gérées par différents modules électroniques incluant :

  • - un générateur de rampes permettant des démarrages et des arrêts progressifs et réglables,
  • - un limiteur de débit réglable augmentant ou réduisant l'amplitude et la précision de la commande manuelle,
  • - un module enregistreur mémorisant toutes les informations issues des vérins, les vitesses et amplitudes des mouvements pouvant ainsi être répétées,
  • - un dispositif enregistreur de données permettant de conserver les informations et de les réutiliser ultérieurement.

Une batterie d'acumulateurs, intégrée à l'ensemble 5, assure l'alimentation des différents éléments de contrôle ou de commande. Un capot 27 protège les appareillages décrits ci-dessus et permet leur accès pour procéder à des réglages, tout en pouvant servir de support pour un opérateur.The hydraulic control assembly 5, which supports the rotation shaft 9 of the pentograph 6 and the telescopic column 11 and which carries out the upper anchoring of the jacks 22, receives a reservoir of hydraulic fluid supplying by hydraulic motor accumulators of hydraulic fluid 26. For controlling the jacks 22, the assembly 5 includes a proportional solenoid valve with remote control 28 the functions of which are managed by different electronic modules including:
  • - a ramp generator allowing progressive and adjustable starts and stops,
  • - an adjustable flow limiter increasing or reducing the amplitude and the precision of the manual control,
  • - a recording module memorizing all the information from the cylinders, the speeds and amplitudes of the movements being able to be repeated,
  • - a data recording device allowing the information to be stored and reused later.

A storage battery, integrated into the assembly 5, supplies the various control or command elements. A cover 27 protects the devices described above and allows their access to make adjustments, while being able to serve as a support for an operator.

La plate-forme élévatrice mobile ainsi réalisée peut se déplacer verticalement à une vitesse de l'ordre de 50 cm/s, et la surface de référence de son plateau 7 évolue entre 0,26 m (position basse) et 1,65 m (position haute) par rapport au sol.The mobile lifting platform thus produced can move vertically at a speed of the order of 50 cm / s, and the reference surface of its platform 7 varies between 0.26 m (low position) and 1.65 m ( high position) in relation to the ground.

A la figure 5 on a représenté à titre d'exemple, appliqué à la liaison du bras de pentographe 10 avec la biellette de commande 19, un dispositif d'assemblage rapide selon l'invention. Comme on le voit, l'axe 29 de liaison articulée entre le bras 10 et la biellette 19 est immobilisé au moyen d'une broche 30 comportant intérieurement un plongeur 31 qui traverse la biellette 19 et s'engage dans une ouverture de l'axe 29. Le plongeur 31 commande, au repos, la sortie radiale de billes 32 empêchant de retirer la broche. Une simple poussée sur un prolongement extérieur 33 du plongeur 31 assure l'effacement des billes 32 en permettant le retrait aisé de la broche, donc l'extraction de l'axe 29 et le désassemblage rapide des éléments 10 et 19.In Figure 5 there is shown by way of example, applied to the connection of the pentograph arm 10 with the control rod 19, a quick assembly device according to the invention. As can be seen, the axis 29 of articulated connection between the arm 10 and the link 19 is immobilized by means of a pin 30 internally comprising a plunger 31 which passes through the link 19 and engages in an opening of the axis 29. The plunger 31 controls, at rest, the radial outlet of the balls 32 preventing the pin from being removed. A simple push on an external extension 33 of the plunger 31 ensures the erasure of the balls 32 by allowing easy removal of the spindle, therefore the extraction of the pin 29 and the rapid disassembly of the elements 10 and 19.

Le fonctionnement de la plate-forme élévatrice selon l'invention se comprend immédiatement d'après la description qui précède et est le suivantThe operation of the lifting platform according to the invention is immediately understood from the description above and is as follows

Le plateau 7 étant dans sa position basse représentée aux figures 1 et 4, la commande de l'alimentation des vérins 22 provoque la sortie des tiges 21 de ces vérins et la rotation des biellettes 24 dans le sens anti-horaire autour des articulations 23. En raison de cette rotation, une traction est appliquée sur l'extrémité coudée des bras inférieurs 10 ce qui provoque une rotation dans le sens horaire des bras 10 autour de l'arbre 9 en assurant l'extension des pentographes 6 et l'élévation du plateau 7 guidé verticalement par la colonne télescopique 11. Comme on le voit bien à la figure 2, on comprend que l'absence d'appui mobile inférieur pour les pentographes 6 permet d'approcher très près d'obstacles de faible hauteur, tels que des quais par exemple, le plateau 7 surplombant alors ces obstacles d'une façon pouvant être avantageuse dans certains cas d'utilisation.The plate 7 being in its low position shown in FIGS. 1 and 4, the control of the supply of the jacks 22 causes the rods 21 to come out of these jacks and the rotation of the rods 24 counterclockwise around the joints 23. Due to this rotation, a traction is applied to the bent end of the lower arms 10 which causes a clockwise rotation of the arms 10 around the shaft 9 ensuring the extension of the pentographs 6 and the elevation of the plate 7 guided vertically by the telescopic column 11. As can be seen in FIG. 2, it is understood that the absence of lower movable support for the pentographs 6 makes it possible to approach very close to obstacles of low height, such as platforms for example, the platform 7 then overhanging these obstacles in a way that may be advantageous in certain cases of use.

Comme indiqué plus haut et comme représenté à la figure 5, on peut séparer très simplement et sans outil, du châssis mobile 1, l'ensemble constitué par l'ensemble de commande hydraulique 5, le pentographe 6 et le plateau 7. L'ensemble ainsi désassemblé peut être alors utilisé par exemple sur un véhicule, dans le cas où ce genre de prises de vues est à effectuer. Le châssis 1 peut de son côté être utilisé avec un plateau fixe conventionnel.As indicated above and as shown in FIG. 5, the mobile assembly 1, the assembly constituted by the hydraulic control assembly 5, the pentograph 6 and the plate 7, can be separated very simply and without tools. thus disassembled can then be used for example on a vehicle, in the case where this kind of shooting is to be carried out. The frame 1 can for its part be used with a conventional fixed plate.

Les possibilités de désassemblage et réassem- blage rapides des différents éléments de la plate-forme élévatrice selon l'invention sont également importantes en cas de transport.The possibilities for rapid disassembly and reassembly of the various elements of the lifting platform according to the invention are also important in the case of transport.

On comprendra que la description ci-dessus a été donnée à simple titre d'exemple, sans caractère limitatif, et que des adjonctions ou des modifications constructives pourraient y être apportées sans sortir du cadre de l'invention définie par les revendications qui suivent.It will be understood that the above description has been given by way of example, without limitation, and that additions or constructive modifications could be made without departing from the scope of the invention defined by the claims which follow.

Claims (8)

1. Plate-forme élévatrice mobile constituant un support pour une caméra, qui comprend un châssis mobile (1), un pentographe à extension verticale (6) porté par ledit châssis (1), une unité de commande hydraulique (5) et un plateau (7) à l'extrémité supérieure du pentographe (6), caractérisée en ce que le pentographe (6) présente un bras inférieur (10) dont l'extrémité arrière est articulée à l'unité de commande hydraulique (5), sans comporter vers l'avant d'appui inférieur mobile qui est remplacée vers l'arrière par une colonne télescopique (11) reliée à une articulation intermédiaire postérieure (12) du pentographe (6).1. Mobile lifting platform constituting a support for a camera, which comprises a mobile chassis (1), a vertically extending pentograph (6) carried by said chassis (1), a hydraulic control unit (5) and a plate (7) at the upper end of the pentograph (6), characterized in that the pentograph (6) has a lower arm (10) whose rear end is articulated to the hydraulic control unit (5), without comprising towards the front of the mobile lower support which is replaced towards the rear by a telescopic column (11) connected to a posterior intermediate articulation (12) of the pentograph (6). 2. Plate-forme élévatrice selon la revendication 1, caractérisée en ce que le châssis (1), le pentographe (6), l'unité de commande hydraulique (5) et le plateau (7) sont indépendants les uns des autres, l'unité de commande hydraulique (5) étant assemblée d'une part au châssis mobile (1) et d'autre part à la partie inférieure du pentographe (6) par des organes à démontage rapide (30) et le plateau (7) étant assemblé de même à l'extrémité supérieure du pentographe (6) par des organes à démontage rapide (30).2. lifting platform according to claim 1, characterized in that the frame (1), the pentograph (6), the hydraulic control unit (5) and the plate (7) are independent of each other, l hydraulic control unit (5) being assembled on the one hand to the movable frame (1) and on the other hand to the lower part of the pentograph (6) by quick-release members (30) and the plate (7) being similarly assembled at the upper end of the pentograph (6) by quick-release members (30). 3. Plate-forme élévatrice selon la revendication 2 caractérisée en ce que, près de son articulation (9) à l'unité de commande hydraulique (5), le bras inférieur (10) présente une partie coudée reliée par une première biellette (19) à une chape (21) de la tige d'un vérin hydraulique (22) articulé par son fond à l'unité de commande hydraulique (5), une seconde biellette (24) reliant ladite chape (21) à un point fixe (23) de l'unité de commande hydraulique (5).3. lifting platform according to claim 2 characterized in that, near its articulation (9) to the hydraulic control unit (5), the lower arm (10) has a neck portion dée connected by a first link (19) to a yoke (21) of the rod of a hydraulic cylinder (22) articulated by its bottom to the hydraulic control unit (5), a second link (24) connecting said yoke (21) at a fixed point (23) of the hydraulic control unit (5). 4. Plate-forme élévatrice selon la revendication 3, caractérisée en ce que l'unité de commande hydraulique (5) comprend un châssis incorporant un réservoir de fluide hydraulique portant une motopompe qui alimente des accumulateurs hydrauliques reliés aux vérins (22) de commande du pentographe (6).4. lifting platform according to claim 3, characterized in that the hydraulic control unit (5) comprises a frame incorporating a hydraulic fluid reservoir carrying a motor pump which supplies hydraulic accumulators connected to the actuators (22) of the pentograph (6). 5. Plate-forme élévatrice selon la revendication 4, caractérisée en ce que l'unité de commande hydraulique comprend, pour la commande des vérins (22), un électro-distributeur proportionnel à télécommande géré par des modules électroniques comprenant un générateur de rampes, un limiteur de débit réglable et un module enregistreur.5. lifting platform according to claim 4, characterized in that the hydraulic control unit comprises, for the control of the jacks (22), a proportional solenoid valve with remote control managed by electronic modules comprising a ramp generator, an adjustable flow limiter and a recording module. 6. Plate-forme élévatrice selon l'une quelconque des revendications précédentes, caractérisée en ce que le plateau (7) présente à sa partie avant des glissières dans lesquelles peuvent se déplacer des galets (15) portés par l'extrémité avant de bras supérieurs (14) du pentographe (6), alors qu'il comporte vers l'arrière des paliers destinés à être assemblés à des chapes (17) disposées à l'extrémité arrière de bras supérieurs (16) du pentographe.6. lifting platform according to any one of the preceding claims, characterized in that the plate (7) has at its front part of the slides in which rollers (15) can be moved carried by the front end of upper arms (14) of the pentograph (6), while it comprises bearings towards the rear intended to be assembled with yokes (17) arranged at the rear end of upper arms (16) of the pentograph. 7. Plate-forme élévatrice selon la revendication 6, caractérisée en ce que le plateau (7) présente en son centre un élément rotatif (18) dans lequel peut venir se fixer, pour tourner sur 360` , un support destiné à recevoir le matériel de prise de vue et des opérateurs.7. lifting platform according to claim 6, characterized in that the plate (7) has in its center a rotary element (18) in which can be fixed, to rotate on 360`, a support intended to receive the material and operators. 8. Plate-forme élévatrice selon l'une quelconque des revendications précédentes, caractérisée en ce que son châssis mobile (1) présente des trains de roues avant (2) et arrière (3) directeurs, avec un double système de direction (4) autorisant soit un braquage en opposition des trains avant et arrière, soit une orientation en parallèle des quatre roues (3, 4) sur 360` .8. Lifting platform according to any one of the preceding claims, characterized in that its movable chassis (1) has front (2) and rear (3) steering wheel assemblies, with a double steering system (4) authorizing either a steering in opposition of the front and rear axle, or a parallel orientation of the four wheels (3, 4) on 360`.
EP90401916A 1989-04-11 1990-07-03 Mobile lifting platform forming a support for a camera Withdrawn EP0464290A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8904712A FR2645521B1 (en) 1989-04-11 1989-04-11 MOBILE LIFTING PLATFORM CONSTITUTING A SUPPORT FOR A CAMERA

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EP0464290A1 true EP0464290A1 (en) 1992-01-08

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831054A2 (en) * 1996-09-19 1998-03-25 MBB Förder- und Hebesysteme GmbH Lifting device, in particular scissors lift platform
GB2323073A (en) * 1997-03-12 1998-09-16 Michael Robert Holmes A collapsible tower
EP2277819A1 (en) * 2009-07-23 2011-01-26 Waldner Labor- und Schuleinrichtungen GmbH Scissor lift device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645521B1 (en) * 1989-04-11 1991-06-21 Movietech MOBILE LIFTING PLATFORM CONSTITUTING A SUPPORT FOR A CAMERA

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US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
FR974048A (en) * 1941-11-25 1951-02-16 Carriage stand for cinematographic cameras
DE1120096B (en) * 1959-03-17 1961-12-21 Ind Technik M B H Ges Swivel lifting platform
US3024738A (en) * 1961-04-04 1962-03-13 Phil J O'toole Mobile, collapsible display device
FR1413813A (en) * 1964-11-18 1965-10-08 Trepel K G Maschinenfabrik Rolling jack
FR1479687A (en) * 1966-05-10 1967-05-05 elevator, in particular for camera or the like
DE2541895A1 (en) * 1975-09-19 1977-03-24 Sante Zelli Control for steerable camera dolly - has two clutches for simultaneous swivel control linked to one lever
FR2554800A1 (en) * 1983-11-10 1985-05-17 Grange Roger Autocam; automated platform for cinema-video filming
EP0174709A1 (en) * 1984-09-11 1986-03-19 Hanaoka Sharyo Co., Ltd. Lift truck
EP0329346A1 (en) * 1988-02-19 1989-08-23 Vinten Broadcast Limited Improvements in or relating to height adjustable platforms
FR2645521A1 (en) * 1989-04-11 1990-10-12 Movietech Movable lifting platform constituting a support for a camera

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US4221280A (en) * 1978-05-05 1980-09-09 Advance Lifts, Incorporated Bi-elevational platform lift

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FR974048A (en) * 1941-11-25 1951-02-16 Carriage stand for cinematographic cameras
US2471901A (en) * 1945-04-25 1949-05-31 Weaver Mfg Co Load-lifting appliance
DE1120096B (en) * 1959-03-17 1961-12-21 Ind Technik M B H Ges Swivel lifting platform
US3024738A (en) * 1961-04-04 1962-03-13 Phil J O'toole Mobile, collapsible display device
FR1413813A (en) * 1964-11-18 1965-10-08 Trepel K G Maschinenfabrik Rolling jack
FR1479687A (en) * 1966-05-10 1967-05-05 elevator, in particular for camera or the like
DE2541895A1 (en) * 1975-09-19 1977-03-24 Sante Zelli Control for steerable camera dolly - has two clutches for simultaneous swivel control linked to one lever
FR2554800A1 (en) * 1983-11-10 1985-05-17 Grange Roger Autocam; automated platform for cinema-video filming
EP0174709A1 (en) * 1984-09-11 1986-03-19 Hanaoka Sharyo Co., Ltd. Lift truck
EP0329346A1 (en) * 1988-02-19 1989-08-23 Vinten Broadcast Limited Improvements in or relating to height adjustable platforms
FR2645521A1 (en) * 1989-04-11 1990-10-12 Movietech Movable lifting platform constituting a support for a camera

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0831054A2 (en) * 1996-09-19 1998-03-25 MBB Förder- und Hebesysteme GmbH Lifting device, in particular scissors lift platform
EP0831054A3 (en) * 1996-09-19 1999-06-16 MBB Förder- und Hebesysteme GmbH Lifting device, in particular scissors lift platform
GB2323073A (en) * 1997-03-12 1998-09-16 Michael Robert Holmes A collapsible tower
EP2277819A1 (en) * 2009-07-23 2011-01-26 Waldner Labor- und Schuleinrichtungen GmbH Scissor lift device

Also Published As

Publication number Publication date
FR2645521A1 (en) 1990-10-12
FR2645521B1 (en) 1991-06-21

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